#156 add validation for response data to avoid errors

app/src/components/NewsComponent.ts

@@ -53,6 +53,9 @@ export default class NewsComponent extends Vue {
 
     // todo: put into extra class to avoid duplicated code
     private handleData(data: any) {
+        if (!this.isValidNewsData(data)) {
+            return;
+        }
         for (const itemEdge of data.data.newsItems.edges) {
             for (const contentEdge of itemEdge.node.content.edges) {
                 const newsContent = {
@@ -83,4 +86,8 @@ export default class NewsComponent extends Vue {
             await NewsService.getInstance().getAllNewsByLanguageWithoutAuth(i18n.locale) :
             await NewsService.getInstance().getAllNewsByLanguage( i18n.locale);
     }
+
+    private isValidNewsData(data: any) {
+        return data && data.data && data.data.newsItems && data.data.newsItems.edges;
+    }
 }

app/src/views/NewsManagement.ts

@@ -36,7 +36,7 @@ export default class NewsManagement extends Vue {
 
         this.getAllNews(firstCount, language)
             .then((data) => {
-                if (!data.data) {
+                if (!this.isValidNewsData(data)) {
                     this.isLoading = false;
                     return;
                 }
@@ -121,4 +121,8 @@ export default class NewsManagement extends Vue {
     private delay(millis: number) {
         return new Promise((resolve) => setTimeout(resolve, millis));
     }
+
+    private isValidNewsData(data: any) {
+        return data && data.data && data.data.newsItems && data.data.newsItems.edges;
+    }
 }